The version 3.5.3 of free Relevanssi matches the free version up with the Premium 1.14.2 and includes the following changes, including a fix for a fatal error:

• New filter relevanssi_user_searches_limit to adjust the number of user searches shown in the logs.
• Old data check is only done on Relevanssi settings page, not on all admin pages. That should improve admin performance.
• Fixed a fatal error when searching includes private posts.
• New filter: relevanssi_remote_addr can be used to modify the IP address logged to Relevanssi logs.
• Blocked CFDB and WooCommerce shortcodes that are causing problems with Relevanssi.

You can get the latest version through auto-update or from the repository.